Where to find the script property

**Your Godot version:** 3.3.2 stable, latest

**Issue description:**

In the bottom of every node in the scene tree there is the script property, telling me what script is attached to my node.
This script property appears to be a property of the Node class:


However when browsing the Node class I can't find this property: [Node class properies](https://docs.godotengine.org/en/stable/classes/class_node.html#properties)

The object class has a method called [set_script()](https://docs.godotengine.org/en/3.1/classes/class_object.html#class-object-method-set-script), but no script property either.

When I hover with my mouse over the script property in the inspector, it clearly says the property name is "script":


I can even assign a script at will using `$my_node.script = preload("res://script_name.gd")`